<!--
 Copyright 2025 Google LLC

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->

<!-- Determine classes -->
{% set class = "md-header" %}
{% if "navigation.tabs.sticky" in features %}
  {% set class = class ~ " md-header--shadow md-header--lifted" %}
{% elif "navigation.tabs" not in features %}
  {% set class = class ~ " md-header--shadow" %}
{% endif %}

<!-- Header -->
<header class="{{ class }}" data-md-component="header">
  <nav
    class="md-header__inner md-grid"
    aria-label="{{ lang.t('header') }}"
  >

    <!-- Link to home -->
    <a
      href="{{ config.extra.homepage | d(nav.homepage.url, true) | url }}"
      title="{{ config.site_name | e }}"
      class="md-header__button md-logo"
      aria-label="{{ config.site_name }}"
      data-md-component="logo"
    >
      {% include "partials/logo.html" %}
    </a>

    <!-- Button to open drawer -->
    <label class="md-header__button md-icon" for="__drawer">
      {% set icon = config.theme.icon.menu or "material/menu" %}
      {% include ".icons/" ~ icon ~ ".svg" %}
    </label>

    <!-- Header title -->
    <div class="md-header__title" data-md-component="header-title">
      <div class="md-header__ellipsis">
        <div class="md-header__topic">
          <span class="md-ellipsis">
            <a
      href="{{ config.extra.homepage | d(nav.homepage.url, true) | url }}"
      title="{{ config.site_name | e }}"
      aria-label="{{ config.site_name }}"
      data-md-component="logo"
    >
            {{ config.site_name }}
            </a>
          </span>
        </div>
        <div class="md-header__topic" data-md-component="header-topic">
          <span class="md-ellipsis">
            {% if page.meta and page.meta.title %}
              {{ page.meta.title }}
            {% else %}
              {{ page.title }}
            {% endif %}
            </a>
          </span>
        </div>
      </div>
    </div>

    <!-- Color palette toggle -->
    {% if config.theme.palette %}
      {% if not config.theme.palette is mapping %}
        {% include "partials/palette.html" %}
      {% endif %}
    {% endif %}

    <!-- User preference: color palette -->
    {% if not config.theme.palette is mapping %}
      {% include "partials/javascripts/palette.html" %}
    {% endif %}

    <!-- Site language selector -->
    {% if config.extra.alternate %}
      {% include "partials/alternate.html" %}
    {% endif %}

    <!-- Button to open search modal -->
    {% if "material/search" in config.plugins %}
      {% set search = config.plugins["material/search"] | attr("config") %}

      <!-- Check if search is actually enabled - see https://t.ly/DT_0V -->
      {% if search.enabled %}
        <label class="md-header__button md-icon" for="__search">
          {% set icon = config.theme.icon.search or "material/magnify" %}
          {% include ".icons/" ~ icon ~ ".svg" %}
        </label>

        <!-- Search interface -->
        {% include "partials/search.html" %}
      {% endif %}
    {% endif %}

    <!-- Repository information -->
    {% if config.repo_url %}
      <div class="md-header__source">
        {% include "partials/source.html" %}
      </div>
    {% endif %}
  </nav>

  <!-- Navigation tabs (sticky) -->
  {% if "navigation.tabs.sticky" in features %}
    {% if "navigation.tabs" in features %}
      {% include "partials/tabs.html" %}
    {% endif %}
  {% endif %}
</header>
